Great Saphenous Vein Anatomy at the Proximal Medial Thigh as a Potential Site for Rescue Venous Access

July 16, 2026 updated by: Tobias Kummer, Mayo Clinic
The purpose of this study is to assess the anatomy of the great saphenous vein at the level of the medial thigh in the general population in an effort to categorize this as a reliable target vessel for rescue peripheral IV access.

Study Overview

Status

Enrolling by invitation

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

190

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Mayo Clinic in Rochester

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

- Pediatric and adult Emergency Department patients and employees of all ages from all areas of the emergency department or additional training sites staffed by emergency medicine residents.

Exclusion Criteria:

  • Critically ill patients as determined by the Emergency Medicine consultant of record for the patient.
  • Legs not accessible due to dressing, wounds, or other factors.
  • Overlying cellulitis/soft tissue infection or injury.
  • Patients that are prison inmates and patients/patient's surrogates who are unable to give verbal consent/assent.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: US of GSV
Ultrasound of the Great Saphenous Vein
Diagnostic test: US ot the GSV
Ultrasound of the Great Saphenous Vein

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Successful visualization of GSV
Time Frame: 12 months
Number of times the great saphenous vein is identified at the level of the medial distal thigh in the general population using ultrasound
12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Mayo Clinic

Investigators

  • Principal Investigator: Tobias Kummer, MD, Mayo Clinic

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 4, 2021

Primary Completion (Estimated)

May 1, 2045

Study Completion (Estimated)

May 1, 2045

Study Registration Dates

First Submitted

May 7, 2021

First Submitted That Met QC Criteria

June 8, 2021

First Posted (Actual)

June 10, 2021

Study Record Updates

Last Update Posted (Actual)

July 20, 2026

Last Update Submitted That Met QC Criteria

July 16, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • 21-002859

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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